The purpose of the study is to see if there is a connection between a proximal humerus fracture dislocation direction and the likelihood of developing avascular necrosis. Utilizing a retrospective cohort from the last ten years we hope to bring consenting patients back for a single visit to have x-rays and complete patient reported outcome measures to assess for evidence of avascular necrosis.
The incidence of proximal humerus fractures continues to increase and is among one of the more common fractures seen in the adult population. Proximal humerus fracture dislocations, however, are less common. Despite the decreased prevalence, fracture dislocations have unique challenges with respect to obtaining an anatomical reduction and more frequently involve an open surgical reduction. In addition, depending on other fracture characteristics, there are various treatment options for the fracture itself. While fracture dislocations ultimately lead to increased AVN and revision surgery, further discussion surrounding the direction of dislocation and how it may influence overall outcomes has not been addressed in the previous literature. The study design utilizes a retrospective cohort from the last ten years, by asking patients who have had a previously surgically treated proximal humerus fracture dislocations to come back to the surgeon's private clinic to complete a single visit assessment. During this assessment the consenting participant will receive x-rays and complete patient reported outcome measures. In conjunction, these will be utilized to assess overall function and the existence of avascular necrosis.
Study Type
OBSERVATIONAL
Enrollment
25
Consenting participants will be asked to come into the clinic for a single visit, during this visit they will be asked to complete an x-ray to check for evidence of avascular necrosis.
Royal Columbian Hospital/Fraser Health Authority
New Westminster, British Columbia, Canada
Rates of Avascular Necrosis
The presence and advancement of avascular necrosis (as classified by the Cruess Classification System) and as assessed on radiographs.
Time frame: At least 2 years post fracture fixation
Direction of the Humeral Fracture Dislocation
As characterized by the direction of the humeral head in relation to the glenoid, based on AP, Lateral, or Axillary x-ray views.
Time frame: At least 2 years post fracture fixation
DASH (functional outcome)
Asking participants to complete the Disabilities of the Arm, Shoulder, and Hand outcome measure as a way of assessing function.
Time frame: At least 2 years post fracture fixation
Constant Score (functional outcome)
Asking participants to complete the Constant Score patient reported outcome measure as a way of assessing participant function.
Time frame: At least 2 years post fracture fixation
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